EcoFlow DELTA 3 Ultra vs Goal Zero Yeti 6000X
Side-by-side on the specs that decide it — surge, capacity, runtime and price.
Both models' specs verified against manufacturer listings · Last updated
The short answer
EcoFlow DELTA 3 Ultra costs $3700 less. Whether that gap is worth closing depends on what you need to run.
- Goal Zero Yeti 6000X holds 98% more energy (6071Wh vs 3072Wh), so it runs the same load proportionally longer.
- EcoFlow DELTA 3 Ultra has 3700W more surge headroom (7200W vs 3500W) — that decides whether a fridge, pump or AC compressor will actually start.
- EcoFlow DELTA 3 Ultra is 22.2 lb lighter (83.8 lb vs 106 lb).
- EcoFlow DELTA 3 Ultra uses LiFePO4 while the other uses NMC — roughly double the usable cycle life.
- EcoFlow DELTA 3 Ultra is rated for 4,000 cycles vs 500 — meaningful if you cycle it daily.
If you plan to cycle the battery daily, think twice about the Goal Zero Yeti 6000X. Its NMC cells are rated for 500 cycles against the LiFePO4 rival's longer life — over years of regular use that's the more expensive unit, whatever the sticker says.
3kWh with 7200W surge at $1799 — this is whole-home territory at a mid-range price. The catch is the 800W solar input.
Best for: Grid-tied home backup where you recharge from the wall, not the sun.
Where it falls short:
- 800W solar input is low for 3kWh — slow off-grid refills
- 83.8 lb
A huge-capacity home unit whose weakness is the same as its siblings: NMC cells with a low cycle count, at a flagship price.
Best for: Large-capacity backup for infrequent, deep-discharge use.
Where it falls short:
- NMC — ~500 cycles
- 2,000W output is low for the capacity
- 106 lb, 2-year warranty
| Spec | EcoFlow DELTA 3 Ultra | Goal Zero Yeti 6000X |
|---|---|---|
| Price | $1799 | $5499 |
| Capacity | 3072 Wh | 6071 Wh |
| Continuous output | 3600 W | 2000 W |
| Surge output | 7200 W | 3500 W |
| Battery | LiFePO4 | NMC |
| Rated cycles | 4,000 | 500 |
| Weight (lighter wins) | 83.8 lb | 106 lb |
| Max solar | 800 W | 600 W |
| Recharge time (faster wins) | 1h 30m | 4h 30m |
Runtime head-to-head
| Appliance | EcoFlow DELTA 3 Ultra | Goal Zero Yeti 6000X |
|---|---|---|
| Refrigerator | 43.5 hrs | 86.0 hrs |
| Mini fridge | 82.9 hrs | 163.8 hrs |
| Chest freezer | 32.6 hrs | 64.5 hrs |
| CPAP machine | 65.3 hrs | 129.0 hrs |
| Sump pump | 3.3 hrs | 6.5 hrs |